<template>
  <div>
    <!-- 头部面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 头部提示信息 -->
      <el-alert
        title="添加商品信息"
        type="info"
        :closable="false"
        center
        show-icon
      ></el-alert>
      <!-- 步骤条 -->
      <el-steps
        align-center
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- 商品表单验证 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-position="top"
      >
        <!-- tabs标签页 -->
        <el-tabs
          @tab-click="tabClicked"
          :before-leave="beforeTabLeave"
          v-model="activeIndex"
          :tab-position="tabPosition"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input
                v-model="addForm.goods_price"
                type="goods_number"
              ></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input
                v-model="addForm.goods_weight"
                type="goods_number"
              ></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input
                v-model="addForm.goods_number"
                type="goods_number"
              ></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="catelist"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              v-for="(v, i) in manyList"
              :key="v.attr_id"
              :label="v.attr_name"
            >
              <el-checkbox-group v-model="v.attr_vals">
                <el-checkbox
                  border
                  v-for="(vname, vi) in v.attr_vals"
                  :key="vi"
                  :label="vname"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              v-for="(v, i) in onlyList"
              :key="i"
              :label="v.attr_name"
            >
              <el-input v-model="v.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor
              v-model="addForm.goods_introduce"
              ref="myQuillEditor"
            >
            </quill-editor>
            <!-- 添加商品按钮 -->
            <el-button type="primary" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 预览图片的对话框 -->
    <el-dialog title="图片预览" :visible.sync="previewVisiable" width="100%">
      <img :src="previewPath" />
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'

export default {
  data() {
    return {
      // 图片上传的请求头
      headerObj: {
        Authorization: window.localStorage.getItem('token')
      },
      uploadUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
      onlyList: [],
      manyList: [],
      // 分类列表
      cateProps: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id'
      },
      catelist: [],
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_cat: [],
        goods_number: 0,
        goods_weight: 0,
        pics: [],
        // 商品的详情描述
        goods_introduce: '',
        attrs:[],
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'change' }
        ]
      },
      tabPosition: 'left',
      // 激活步骤索引
      activeIndex: '0',
      previewPath: '',
      previewVisiable: false
    }
  },
  methods: {
    // 添加商品
    add(){
      this.$refs.addFormRef.validate(async vlid=>{
        if(!vlid) return this.$message.error('请填写必要的表单项!')
        // 执行添加的业务逻辑
        // 利用lodash深拷贝表单对象
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        this.manyList.forEach(item=>{
          const newInfo = {attr_id: item.attr_id, attr_value: item.attr_vals.join(' ')}
          this.addForm.attrs.push(newInfo)
        })
        this.onlyList.forEach(item=>{
          const newInfo = {attr_id: item.attr_id, attr_value: item.attr_vals}
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        console.log(form);
        // 发起请求添加商品
        // 商品的名称必须是唯一的
        const {data: res} = await this.$http.post('goods', form)
        console.log(res)
        if(res.meta.status!==201) return this.$message.error('添加商品失败') 
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    },
    // 监听图片上传成功的方法
    handleSuccess(response) {
      const picInfo = { pic: response.data.tmp_path }
      this.addForm.pics.push(picInfo)
    },
    // 处理图片移除的效果
    handleRemove(file) {
      // console.log(file)
      // 获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 从pics数组中，找这个图片对应的索引值
      const i = this.addForm.pics.findIndex(s => s.pic === filePath)
      this.addForm.pics.splice(i, 1)
    },
    // 处理图片预览效果
    async handlePreview(file) {
      this.previewPath = file.response.data.url
      this.previewVisiable = true
    },
    async tabClicked() {
      // 访问的是动态参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' }
          }
        )
        if (res.meta.status !== 200) return this.$message.error('获取参数失败')
        res.data.forEach(
          item =>
            (item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : [])
        )
        this.manyList = res.data
        console.log(this.manyList)
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'only' }
          }
        )
        if (res.meta.status !== 200)
          return this.$message.error('获取静态属性失败')
        this.onlyList = res.data
      }
    },
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length < 3) {
        return false
      }
    },
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200)
        return this.$message.error('获取商品分类数据失败')
      this.catelist = res.data
    }
  },
  created() {
    this.getCateList()
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 15px 0 0 !important;
}

.quill-editor {
  margin-bottom: 15px
}
</style>
